A: A study at Newcastle University in England confirmed what dairy farmers have long understood — contented cows produce more milk. Bovines who were given names, spoken to affectionately, and treated with kindness, produced as much as 68 more gallons of milk annually than animals who hadn't been socialized to humans. Plus there's presidential precedent — Howard Taft kept a cow named Pauline Wayne on the front lawn of the White House to provide milk for the first family.